eventtimer.java

Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套 代码

import java.awt.event.*;
import javax.swing.Timer;

/** EventTimer class (abstract)
 *  Author: David Riley
 *  Date: May, 2004 
 */
public abstract class EventTimer extends Timer implements ActionListener  {

    /** pre:    m > 0  <br>
     *  post:   actionPerformed events are scheduled to occur every m milliseconds <br>
     *  note:   a call to start is required to initiate the first event 
     */
    public EventTimer(int m)  {
    	super(m, null);
        addActionListener( this );
    }
    
    /** EVENT HANDLER - called in response to each scheduled event
	 *		(This method is designed to be overridden.) 
     */
    public void actionPerformed( ActionEvent e )  {
    }
    	
}